Prank douglas



@uiten tstes @stent @ffice FRANK DOUGLAS, O F NORWICH, CONNECTICUT.

Letters Patent No. 70,702, dated November 12, 1867.

IMPROVED BLIND-STAPLE.

To ALL wHoM 1T Mar ooNcERN: l

Be it known that I, FRANK DOUGLAS, of' Norwich, in the county of New London, and State of Connecticut,

have invented a new and improved Blind-Staple for connecting blind-slats to the rods which guide and govern their position,and for which staples I desire to obtain Letters Patent, as for a. new manufacture; and the following is a full, clear, and .exact description of the form of said staple, and the modo of construction, which Jwill be more fully understood by reference to tbe accompanying drawings, which form :t part ol this specilication.

The nature of my invention consists in the productionof o. vendible article, of'a new and highly-convenient and useful shape, and for thc purpose of holding blind-slats to the rod in such a way that they hold their relative position to each other and from each other, when shut or opened by the rod which moves and controls them.

Said staples are constructed in such shape that a sharp point is produced for insertion into the wood, and so corrugated that when driven into Athe wood they cannot easily be drawn out. They can also bemade in large quantities by machinery, and kept in the market as an article of merchandise. In .the drawings- Figure 1 represents an edge-view; stapleA showing the eorrugations, with stapleB hanginginto it, showing a side view. l

Figure 2 represents staples C and D bent, and as they look before being corrugateo.

As the wire passes into the machine, for the manufacture of staples, it is cut oif in the required lengths for staples, and on an angle, as represented by e e, staple C, g. 2. It is then bent U-shape, as seen at C D, fig. 2.

` It'his then passed between corrugated rollers or dies fitting into each other, in such a manner as to produce the corrugated staples, as represented in fig. 1. In process of corrugating, the straight sides of points e e, iig. 2, are bent Aover to correspond with the cut angles on the opposite sides, so as to form a true and sharp flat point, as represented by rig. 1.

This staple cen be easily driven into the wood by machinery, without previously pricking or making o. hole, und the grain of the wood is parted as it enters, and closes into the corrugations, which will prevent its being drawn out easily. v

While this staple possesses all the advantages of the barbed staple, it possesses the advantage of notbcing weakened by deep barbs or'grooves across thewire. In my staple the whole strength ofthe wire remains, while a sharp and easy cutting point is made by the sharp angle ofthe cut and the bent position of the pointis to make it central and true.

I do not claim as my invention o. barbed staple, as that was patented by Byran Boardman, of Norwich Connecticut, March 30, 1858, but what I claim as my invention, and desire t'secure by Letters Patent, is-

s a new article of'manufacture, n. blindstaple of corrugated wire, as herein described.

FRANK DOUGLAS.

Witnesses:

ALBERT S. Bornes. E. T. WAI'rn. 

